Multiple vulnerabilities in NetBSD
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | N/A |
| CWE-ID | CWE-264 CWE-20 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
NetBSD Operating systems & Components / Operating system |
| Vendor | NetBSD Foundation, Inc |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Privilege escalation
EUVDB-ID: #VU9822
Risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a missing mask in a syscall in in sys/arch/sparc64/sparc64/compat_13_machdep.c on sparc64 architecture. A local unprivileged user can set privileged bits, such as PSTATE_PRIV in the %pstate register and gain escalated privileges on the system.
Install update from vendor's website.
NetBSD: 6.0 - 7.1
External linkshttp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2018-001.txt.asc
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Privilege escalation
EUVDB-ID: #VU9823
Risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to an error in compat_linux32 when handling GDT on amd64 system in sys/compat/linux32/arch/amd64/linux32_machdep.c. A local unprivileged user can create a condition where a page fault is generated if a segment register is reloaded with a "high" selector, located near the end of the GDT, and gain root access to the system.
Install update from vendor's website.
NetBSD: 6.0 - 7.1
External linkshttp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2018-001.txt.asc
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Improper input validation
EUVDB-ID: #VU9824
Risk: Low
CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to an input validation error in sys/arch/i386/i386/i386_trap.S (for NetBSD 7.x) or sys/arch/i386/i386/vector.S (for NetBSD 6.x) when the #UD exception handler is implicitly using the %ds register, before it actually initialized it to the kernel value. A local unprivileged user can crash the system.
Install update from vendor's website.
NetBSD: 6.0 - 7.1
External linkshttp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2018-001.txt.asc
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
